I have a better suggestion, since this virus is airborne transmitted and most likely be transmitted by talking to each other, banning all these FAs from chitchatting with each other will most likely stop the spread.
Really don’t understand what exactly could be reduced. Barely flying AA for a long time since not close to their hubs now but isn’t the stuff already served on one tray on most routes? And are they sure they really served 2nd round beverage in main on routes more than 1400mi before (despite being required to do so)? Even before covid??